Feeding apparatus for chemicals



Dec. 17, 1929. Pr DORSEY 1,739,951

7 FEEDING APPARATUS FOR CHEMICALS Filed May 13, 1927 Patented Dec. 17,1929 A T STATES PATENT}, oFFrcE 7 PARMER DORSEY, OF CHICAGO, ILLINOIS,ASSIGNOR TO THE IMPERIAL BRASS MANU FACTUBING COMPANY, or CHICAGO,ILLINOIS, .A'QORPORATION or ILLINOIS FEEDING APPARATUS non CHEMICALSApplication filed Mav s; 1927. Serial No. 191,085.

My invention is concerned ,with certain new and useful improvements infeeding apparatus for chemicals, which I have shown as substituted for afundamentally different apparatus having the same function in myapplication, Serial No. 525,566, filed December 29, 1921, for anacetylene generator, in which the feed'of the carbide is effectedat'necessary intervals to maintain the desired pressure, by the'gradualrise'and sudden fallof a small gas bell through which all the gas beingdrawn from the generator must pass, the sudden fall being efiected bythe sudden escape from the bell of the gas under pres sure containedtherein when, the bell has been raised by the gas pressure high enoughtolift its open bottom from the sealing liquid necessarily.employed'and'in which it is' or the valve 19 is vibrated, so as tothereby inconstruction. while still- Fig. 1 is central vertical sectionthrough" the upper portion'of an acetylene generator to which myinvention has been applied;

Fig. 2 is a central verticalsection through the controlling mechanismfor the feed, but on a much larger scale; and

Fig. 3 is a detail on an enlarged scale, as

seen from line 3-3 of Fig. 2. a

10 is the generating chamber of the customary type containing water,intowhich the carbide is dropped from the carbide holder 11 occupying theupper'portion of the cylindrical top 120i the casing. Secured in oneside of the casing beneath the carbide chamber 11 is a pressureregulator 13 containing a diaphragm opposed by a spring and acted on bythe pressure of the gas in the generating chamber, so that the positionof the rod 14 projecting therefrom and secured at its outer end to thediaphragmis controlled by the pressure of the gas in the tank 10.Thisrod 14 is pivoted at its outer end to the lever 15 fulcrumed at 16ina suitable bearing piece 17 connecting the lowerconical wall 18 of thecarbide chamber with the lower end'of a cylindrical casing 12; The lever15 I has pivoted in its lower end a mushroom valve 19 which cooperateswith the'circular outlet for the carbide forming the lower end of thecylindrical bottom portion 18, and this valve 19 stands at a distancefrom the outlet opening which varies with the pressure of the gas in thegenerating chamber, and it will be'understood that the lower thepressure of the gas, the. wider the space between the valve 19 and theopening, so that thecarbide will escape in greater quantities each timecrease the amount of gas generated and thus reuse the pressure. 'Whenthe pressure is hlgh, the valve 19 stands closer to. the outlet so thatles'scarbide can escape each time the- 'v valve 19 is vibrated. Thevalve-19 has se-" cured toits under side a rod 20 whichex tends throughthe short-pipe 21 let into the side of the cylinder 12 and connected tothe T 22, which has the short pipe 23 screwed in its upperportion. Theupper end of the pipe 23 is screwed into the boss 24' formed on thelower end of the chamber 25, the upper from by the outlet pipe 34 to thecuttingor ployed in connection with the generator.

' The apparatus thus far described is 'identical with that shown in myapplication,

in the customary manner, and is led therewelding tool, or whateverapparatus is em- Serial *No. 124,878, filed July 26, 1926, to; whichreference is made for a fuller disclosure of the details ofconstruction.

The outer'end of the rod 20 passes through the. eye 35, constituting thelower end of the vertical radii-36 extending up through the pipe no f 23and into the chamber 25. The rod 86 has secured on the upper end thereofa piston 37,

which I have shown as conveniently fastened.

in place by being secured on the threaded upper end of the rod 36 andheld in place by the nut 38. The piston 37. does -.not fit snugly enoughto entirely prevent the passage of gas between it and the cylinder, andis loose enough so that it can fall freely when the pressure-ofthe gasbeneath it is relieved.

For this purposev I employ the valve =89, thelower conical end of whichcooperates with the conical seat 40 formed in the aperture 50 extendingthrough the piston, vThe valve is thebracket 53 and held initsia'djustedpos-i tionby thelook nut 56-.

Toward the end of "the downwardgmov ment of the'piston I 37., the bottomof the valve Y 39 contacts with the bottomof the chamber I 25, so. thatthe continued downward movement of thepiston-causes the valve tobeseated, and the 1 gas pressure to become aagain effectiveonthe underside ofthe piston, .anrlit is: also great enough .to ,hold, the valveseated until the piston-37, which is Araisedsomewhat gradually-duetothelealrage around the edges.

thereof, has risen .to the desiredgheight, when the upper end of thevalve stem 51 contacts with a suitable abutnient, which is prefen ablyaset screw 5f7 threaded through the cover 26,. and secured ingany:desiredi adjustment by the lock nut 58 threaded thereon against the top:of. thecover. lbw-i111; be understood that. when the piston 37. risesuntil the, urpperendof the stem 51 contacts with the abutment 57 thevalve" is opened against the pressure beneathirinaand the .gas "beneathit rushes rapidlythrough the ,passage 50, .ther'eby reducing thepressure beneathv thev piston so. that-the latter .is free to fall. andthus vibrate the r-0d some through it to mushroom valve 19 to cause'thefeed. :To guide the valve,.I provide ita-bove the conical seatportionwitlrthe vertical ribs 59 cooperating with the sides of the passage .50to :center the valveduring its movements. 1

lVhile I. have-shown andcl-escribed .my Lin vention :asembodiedin-theform which Lat present consider bestaadapted to carry out its purposes,it will 'be'aunderstood that it is capable of modifications, and that Ido not desire to be limited iin the "interpretation. of theirfolloavingclaims exceptiis may benec'essitated by the state of the-prior ant;

- What I claim as new, and desire to secure by Letters Patent off theUnited-States'is:

'1. In an apparatus for generatingigas, the

combination with a holder for a dry chemical, of a holder for a liquid,a conduitthrough which the generated gas is delivered, mec-ha-o nism forfeeding the contents from one holder to the other intermittently insmall quantities, alcylinderin said conduit,& piston adaptedtoreciprocate freely insaid cylinder and to be moved in one direction bythe pressure of the gaspassing' through the conduit, a

valve in the piston held closed as it is-frnoved by thepressurefofthegas, an 'abutment rigid- .ly secured within the cylinder in position tobe'engag'ed' the'valve to open it at the limit of i tsmovement torelease the pressure and permit the piston to return, and connectionsfrom. said piston to said .mechanism so that each time. thepistonisreeiprocated the feed isaefie'cted. r

.2. In an apparatus forgeneratinggas, the

combination with a holder for a dry'ohemi-eal, of a holder for a:liquid, a conduit throughv which the generated gas is'delivered,mechanism for feeding' theIcontentsfrom oneholder to the otherintermittently in smallcquantities, a=c ylinderinsaid-conduinapistonadapted to reciprocate freely insaid' cylinder and-tobe moved in one direction by the pressure of the gas passing -throughtheconduih a valve in the piston. held. closed; ,as it; Lis moved by thepres-sureof thegas, adjustable-means for. regulating the amount.QfJIlOVGIHBnhglVBn to nism for feeding th'econtents-fromone holder tothe other intermittently in sm al l quantities, a vertical cylinderin-said conduitya piston adapted to reciprocate freely in saicylinderzandto be lifted-by thepressure of-the gas passing through theconduit, a valve in the piston held closed as it is raised by thepressure of the gas, an abutment rigidlysecurred within the cylinder"in-position to he engagedi by the valve to open as: the limit ofv itsupward movement to release the pressure and permit the piston'to fallbygravity, and

connections from said piston to said mechanism so that each time the,piston-is reciprm cated the feed is effected.

,4. In an apparatus-for generating ,gas, the combination with a ThOldBI'.for a dry chemical, of a holder fonaliqu-id, a conduit through whichthe generated gas is delivered,-

- mechanism-for feeding thecontents from one holder to the otherintermittently in small quantities, a vertical-cylinderin said conduit,a piston adapted to reciprocate freely insaid v the valvestem to open itat the limit of its cylinder and to be lifted by the pressure of the gaspassing through the conduit, a valve hav-' ing its stem extending upwardthrough the 3 piston. and its head adapted to be held seated p 5 in thebottom of the piston by the pressure of the gas, an abutment rigidlysecured With-v in the cylinder in position to be engaged by upwardmovement to release the pressure and permit the piston to fall bygravity, and connections from said piston to said mechanism so that eachtime the piston is reciprocated the feed is effected. I

In Witness whereof, I have hereunto set my hand this 29th day of April,1927.

" PARMER DORSEY.

